package com.sias.bean;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.BeansException;
import org.springframework.beans.PropertyValues;
import org.springframework.beans.factory.config.DestructionAwareBeanPostProcessor;
import org.springframework.beans.factory.config.InstantiationAwareBeanPostProcessor;
import org.springframework.stereotype.Component;

import java.beans.PropertyDescriptor;

/**
 * @author 吴文杰
 * @version 1.0
 * @since 2023/5/31 16:56
 */
@Component
public class MyBeanPostProcessor implements InstantiationAwareBeanPostProcessor, DestructionAwareBeanPostProcessor {

  private static final Logger log = LoggerFactory.getLogger(MyBeanPostProcessor.class);

  @Override
  public void postProcessBeforeDestruction(Object bean, String beanName) throws BeansException {
    if (beanName.equals("lifeCycleBean")){
      log.debug("<<<<<<<< 销毁之前执行，如@preDestory");
    }
  }

  @Override
  public Object postProcessBeforeInstantiation(Class<?> beanClass, String beanName) throws BeansException {
    if (beanName.equals("lifeCycleBean")){
      log.debug("<<<<<<<< 实例化之前执行，这里返回的对象会替换原本的bean");
    }
    return InstantiationAwareBeanPostProcessor.super.postProcessBeforeInstantiation(beanClass, beanName);
  }

  @Override
  public boolean postProcessAfterInstantiation(Object bean, String beanName) throws BeansException {
    if (beanName.equals("lifeCycleBean")){
      log.debug("<<<<<<<< 实例化之后执行，这里如果返回false 会跳过依赖注入阶段");
    }
    return InstantiationAwareBeanPostProcessor.super.postProcessAfterInstantiation(bean, beanName);
  }

  @Override
  public PropertyValues postProcessProperties(PropertyValues pvs, Object bean, String beanName) throws BeansException {
    if (beanName.equals("lifeCycleBean")){
      log.debug("<<<<<<<< 依赖注入阶段执行，@Autowired @Value @Resource");
    }
    return InstantiationAwareBeanPostProcessor.super.postProcessProperties(pvs, bean, beanName);
  }


  @Override
  public Object postProcessBeforeInitialization(Object bean, String beanName) throws BeansException {
    if (beanName.equals("lifeCycleBean")){
      log.debug("<<<<<<<< 初始化之前执行，这里返回的对象会替换原本的bean，如@PostConstruct  @ConfigurationProperties");
    }
    return InstantiationAwareBeanPostProcessor.super.postProcessBeforeInitialization(bean, beanName);
  }

  @Override
  public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
    if (beanName.equals("lifeCycleBean")){
      log.debug("<<<<<<<< 初始化之后执行，这里返回的对象会替换原本的bean，如代理增强");
    }
    return InstantiationAwareBeanPostProcessor.super.postProcessAfterInitialization(bean, beanName);
  }
}
